Wax-thread sewing-machine



(No Model.) I

o. P. BOSWORTH.

' WAX THREAD SEWING MAGHINE. No. 259,083. I Patented June 6; 1882..

Z [272' @Zm N. PETERa Pholo-Lilhngnphur, Washington. n40.

UNITED STATES A PATENT OFFICE.

CHARLES F. BOSWORTH, OF MILFORD, CONNECTICUT.

WAX-THREAD SEWING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 259,083, dated June 6, 1882.

' Application filed April 24,1882. (No model.)

To all whom it may concern.- I

Beit known that I, CHARLES F. BOSWORTH, of Milford, in the county of New Haven and State of Connecticut, haveinvented a new Improvement in Wax-Thread Sewing-Machines; and I do hereby declare the following,when taken in connection with accompanying draw ings' and the letters of reference marked thereon, to be a full, clear, and exact description of thesame, and whichsaid drawings constitute part of this specification, and represent, in

Figure 1, a side view; Fig. 2, a rear end view; Fig. 3, a transverse section on line was; Fig. 4, a top view; Fig. 5, a longitudinal section; Figs. 6, 7, and 8, detached views.

This invention relates to an improvement in apparatus for applying the wax in wax-thread sewing-machines.

It is well known that in wax-thread sewingmachines the application to the thread before its introduction through the leather causes the working of the thread through the leather and the needle to remove the wax-that is, strip "the thread so that no wax practically enters the leather. Various devices have been employed to apply the wax to the thread-as, for instance, by a spoon-like device which raises the quantity of wax and pours it onto the thread. While this produces a very good result, the application of the wax is very unequal, some stitches getting too much, others not enough.

The object of my invent-ion is to apply a predetermined regulated quantity of wax to the loop of thread which has been carried through the material by the needle, and preparatory to drawing that loop back to complete the stitch; and it consists in a bath having a constant level of melted wax therein, combined with a disk revolving so that the one edge dips into the bath to a certain predetermined extent, and so that a certain quantity of wax adhering thereto is taken up by the revolution of the disk and presented to the loop of needle-thread at the proper time, and so that the thread takes therefrom the required quantity of wax, and in details of construction whereby the quantity is regulated, as

.more fully hereinafter described.

A represents the reservoir, arranged to contain a quantity of wax, and provided with any suitablemeans for maintaining a degree of will enter it carrying the threat dtated in Fig. 5.

heat sufficient to hold the wax in a melted state. This may be by a burner beneath, as seen in Fig. 2, or otherwise. 5 5

B is the bath, which is arranged in a position below theneedle, and so a th a d le a asin- Longitudinally through the reservoirA and bath B is a shaft, C, to which an intermittent rotation is imparted through a ratchet, D, as seen in Fig. 2, this ratchet being arranged so that as the needle-arm descends a finger from that or some other part of the machine will turn the ratchet D one notch, where it will be caught by the spring-pawl E. On this shaft 0 is a disk, F, which revolves in the reservoir, and so as to dip'into the wax in the reservoir, as indicated in Fig. 5. The lower side of this disk, thus dipping into the hot wax, raises more or less of the wax,which will adhere to it, and carries it up and over against a partition, I),- the face of the disk running close to this partition, it is-scraped, and takes from that surface the wax .which 'may be thereon. This partition 11 is inclined, as seen in Fig. 6, and conducts the wax thus scraped from the disk out from the reservoir through an opening, (1, (see Figs. 3 and 6,) into the bath B. Thus at each rotation of theshaft C wax will be delivered to the bath over the partition b and through the opening d, and will thus continue to flow into the bath until the wax in the bath rises to thelevel indicated in broken lines, Fig. 5, at which point there is an opening, 6, leading back into the reservoir, as seen in Figs. 3 and 5. By this construction the wax isfed from the reservoir to the bath in sufficient quantity to maintain a level in the bath at the opening 6. On the same shaft, C, is a second disk, f, in the bath B,which has an intermittent rotation with the shaft C. lts lower edge dips into the wax in the bath, so as to receive therefrom a quantity corresponding to the depth to which it dips, and taking from the bath this quantity it carries it up, and passing the thread in the needle, as seen in Figs. 4 and 5, the wax on the disk is scraped or wiped off onto the thread, so that in the as cent of the needle to take the thread back through the work it takes with it sufficient hot wax, and in a constant and regular quantity, because each intermittent movement of the shaft presents the same quantity of wax to the thread.

In order to adjust the quantity of wax, the disk f is adjustable with relation to the level of the wax in the bath. This is best done by resting the shaft 0 upon a spring, 71, as seen in Figs. 3 and 5. Above the shaft an eccentric, i, is arranged to bear thereon, which eccentric is turned by alever, I, attached to the shaft k of the eccentric outside. By turning the eccentric in one direction the shaft is depressed, so that the disk f will run deeper in thebath. In theoppositedirection it raises the disk from the bath.

As a further means for adjusting the quantity of wax carried up by the disk, an adjustable scraper, m, is arranged in the bath above the wax. This scraperishung,as seen in Fig. 7, so as to be movable toward or from the periphery of the disk, and will therefore regu late the quantity of wax on the disk according to its distance from the periphery.

As the disk Fnecessarily takes up wax upon both surfaces, I provide the scraper r upon the opposite side to the partition b, as seeniu Figs. stand 8, which runs in so close contact with the surface and periphery of the disk F as to take therefrom the wax carried up on the periphery and surface, turning it back again into the reservoir, and which will prevent an undue coating of the disk. I

Iuillnstrat-ing my invention I have described the needle-thread as carried down to the waxing mechanism by the needle itself; but the thread may be otherwise taken down -as, for illustration, by a hook which will engage the loop of the needle-thread, and be moved down to present that loop to the waxing-disk.

While I prefer the mechanism which I have described to adjust the disks or their dip into the wax, it will be understood by those skilled in this art that other well-kuown devices may be employed to produce this adjustment.

1 also prefer an intermittent rotation of the shaft and disks, as described; but it will be nn derstood that this may be a slow constant revolution and accomplish the object of this invention. I therefore do not wish to be understood as limiting my invention to the particle lar devices described.

I claim 1. In a wax-thread sewing-machine, the bath containing melted wax and a rotating device working in said bath, andin the relation to the loop of needle-thread described, whereby said rotating device takes the wax from said bath and delivers it to the thread, substantially as described.

2. In awax-thread sewing-machiue,the waxbath,withmechanism,substantiallysuch asdescribed, to deliver theregulated quantity ot'wax to said bath, and a rotating device running in said bath and in relation to the needle-thread, substantially as described, whereby the said rotating device takes the wax from the bath and delivers it to the thread, substantially as and for the purpose described.

3. In a waxthread sewing-machine, the waxbath, with mechanism, substantially such as described, to deliver the regulated quantity of wax to said bath, and a rotating device running in said bath and in relation to the needlethread, substantially as described, whereby the said rotating device takes the wax from the bath and delivers it to the thread, and an adjustable scraper, at, substantially as and for the purpose described.

4. In a wax-thread sewing-machine, the bath containing melted wax, a rotating device working in said bath, and in the relation to the needle-thread described, whereby said rotating device takes the wax from said bath and delivers it to the thread, and mechanism, substantially such as described, to adjust the dip of the rotating device into the bath, substantially as and for the purpose described.

5. In a wax-thread sewing-machine, the reservoir containing wax in a melted state, an intermittently-rotatiug device arranged to dip into the wax in said reservoir, take a portion therefrom, and deliver it to a bath in connection with said reservoir, the connection between the bath and reservoir being such substantially as described, whereby a constant level is maintained in the said bath,aud a correspondingly intermittent rotating device in said bath, substantially as and for the purpose described.

6. In a wax-thread sewing-machine, the reservoir containing wax in a melted state, an intermittently rotating device arranged to'dip into the wax in said reservoir, take a portion therefrom, and deliver it to a bath in connection with said reservoir, the connection between the bath and reservoir being such substantially as described, whereby a constant level is maintained in the said bath, and a correspondinglyintermitteut rotating device in said bath, with mechanism, substantially such as described, to adjust the dip of said rotating devices into the reservoir and bath, substantially as described.

7. In a wax-thread sewing-machine, the combination of the reservoir A, bath B, shaft G, carrying the disk F in the reservoir and the disk f in the bath, mechanism, substantially such as described, to impart rotation to said shaft and disk, a partition, b,arranged to conduct the wax from the disk F into the bath, and an opening, 6, from said bath back into the reservoir, substantiallyas and for the purpose described.

8. In a wax-thread sewing-machine, the combination of the reservoir A, bath B, shaft (J, carrying the disk F in the reservoir and the disk f in the bath, mechanism, substantially such as described, to impart rotation to said shaft and disk, a partition, 1), arranged to conduct the wax from the disk F into the bath, anti an opening, 0, from said bath back into the reservoir, and mechanism, substantially such as described, to adjust said disks, substantially as described.

9. In a wax-thread sewing-machine,the combination of the reservoir A, bath B, shaft 0, carrying the disk F in the reservoir and the disk f in the bath, mechanism, substantially such as described, to impart rotation to said shaft and disk, a partition, b, arranged to conduct the Wax from the disk F intothe bath, and an opening, 6, from said bath back into the reservoir, with the adjustable scraper m, substantially as described.

10. In a wax-thread sewing-machine, the combination of the reservoir A, bath B, shaft 0, carrying the disk F in the reservoir and the disk f in the bath, mechanism, substantially such as described, to impart rotation to said shaft and disk, a partition, b, arranged to conduct the wax from the disk F into the bath, and an opening, e, from said bath back into the reservoir, with the adjustable scraper m, and

Vmechanism, substantially such as described,

to adjust the elevation of the disks, substantially as and for the purpose described.

11. In a wax-thread sewing-machine, the

combination of the reservoir A, bath B, shaft 0, carrying the disk F in the reservoir and the disk f in the bath, mechanism, substantially such as described, to'impart rotation to said oHARLEs 1 BOSWORTH.

Witnesses:

JOHN E. EARLE, LILLIAN D. ROGERS. 

